CBSE Class 9 Answered
In figure, if AB||CD, FAE = 90o and AFE = 40o then find ECD.
Asked by Topperlearning User | 05 Dec, 2013, 01:56: AM
Expert Answer
By angle sum property in triangle FAE.
90o + 40o + AEF = 180o
Or, AEF = 50o
CEB = AEF = 50o (vertically opp. angles)
ECD + CEB = 180o
Or, ECD + 50o = 180o
ECD = 130o
Answered by | 05 Dec, 2013, 03:56: AM
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